CVE•Published 2026-07-30•Modified 2026-08-25•1 article on news•6 live references•NVD data
CVE-2026-58066Rocket.chat · Rocket.chat
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
16
Exploit Prediction Scoring System · top 84% of all CVEs
Weaknesses (CWE)
Description
Rocket.Chat's SAML SSO before versions 8.7.0, 8.6.1, 8.5.2, 8.4.5, 8.3.7, 8.2.7, 8.1.7, 8.0.8, and 7.10.14 verified XML signatures but did not bind the validated signature to samlp:Response / saml:Assertion. An attacker could submit a wrapped document carrying forged identity attributes alongside any valid signature made by the trusted IdP certificate, and log in as an arbitrary user.
Timeline
Published 2026-07-30
Modified 2026-08-25
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag338 hosts
vuln:CVE-2026-58066Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Rocket.chat Rocket.chat"All exposed Rocket.chat Rocket.chat instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Rocket.chat"HTTP body or banner mentions "Rocket.chat" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-58066Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-58066Censys host search filtered to this CVE id.
grep.app
CVE-2026-58066Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-58066GitHub code search for direct mentions.
Google dork
"CVE-2026-58066" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-58066 on GitHub.